CN212257487U

CN212257487U - Battery module

Info

Publication number: CN212257487U
Application number: CN202020893701.3U
Authority: CN
Inventors: 张伟强; 戴贤青; 胡志攀; 谢小梅
Original assignee: Guangdong Yiding New Energy Automobile Co ltd
Current assignee: Huizhou Yiwei New Energy Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-12-29
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to a battery module, including group battery, mounting bracket, soft glue film, sticky tape, baffle, offset plate and heat conduction piece. The battery pack is a plurality of single batteries arranged side by side, the top of each single battery is a conductive part, each conductive part comprises a positive electrode and a negative electrode, and adjacent single batteries are bonded and connected through a soft rubber layer. The preceding, the rear end face of mounting bracket run through and form the holding tank, and a plurality of monomer batteries that set up side by side are placed in the mounting bracket along the holding tank direction. The single batteries at the two ends of the battery pack are connected with the baffle through the soft rubber layer in an adhesive manner, and the fixed mounting frame and the two baffles are connected through the adhesive tape. The rubber plate is arranged right above the single battery. The heat conduction block is sandwiched between the conductive portions of the adjacent unit cells.

Description

Battery module

Technical Field

The utility model relates to a battery PACK field especially relates to a battery module.

Background

The existing battery module is formed by stacking a plurality of battery monomers, and the stacked battery monomers are fixedly connected through an assembly part, so that the plurality of battery monomers are free from looseness. The existing battery module has the following technical problems:

1. the battery module uses more assembly parts such as bolts and the like, so that the assembly among the battery monomers is complicated;

2. the heat conduction devices are not arranged among the battery monomers, so that the temperature of each battery monomer is inconsistent when the battery module is charged and discharged, the cycle life of the battery monomers is shortened, and even the thermal runaway of the battery module is caused;

3. along with the increase of the charge-discharge cycle period of the battery module, the thermal expansion can occur to the electric core inside the battery monomer, so that the extrusion force is applied to the inside of the battery module, and the battery module is deformed seriously.

To the technical problem who exists among the prior art, the utility model provides a battery module of novel structure.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery module, include:

the battery pack is a plurality of single batteries arranged side by side, the tops of the single batteries are conductive parts, and the conductive parts comprise anodes and cathodes;

the front end face and the rear end face of the mounting rack penetrate through the mounting rack to form a containing groove, and the plurality of single batteries arranged side by side are placed in the mounting rack along the direction of the containing groove;

the rubber plate is arranged right above the single battery and can cover the opening of the top end face of the mounting frame, a plurality of positive mounting holes and a plurality of negative mounting holes are formed in the rubber plate, the number of the positive mounting holes is consistent with that of the negative mounting holes, the positive mounting holes are arranged along the positive arrangement direction of the single battery, the negative mounting holes are arranged along the negative arrangement direction of the single battery, and the positive electrode and the negative electrode of the single battery are respectively inserted into the positive mounting holes and the negative mounting holes;

the adjacent single batteries are connected by the soft rubber layer in an adhesive way;

the single batteries positioned at the two ends of the battery pack are bonded and connected with the baffle through the soft rubber layer;

the heat conduction block is clamped between the conductive parts of the adjacent single batteries;

and the adhesive tape is used for connecting and fixing the mounting frame and the two baffles, so that the two baffles clamp the plurality of single batteries between the two baffles.

In one embodiment, the baffle is made of a steel plate, so that the physical protection of the battery module is enhanced. The operator binds the mounting bracket and the two steel plates using the adhesive tape, thereby integrating the mounting bracket, the steel plates, and the battery pack.

The soft adhesive layer is a buffer layer and can absorb the pressing force through self deformation. The heat conduction block can realize heat conduction.

In one embodiment, the soft adhesive layer is made of insulating silica gel.

In one embodiment, the softgel layer is made of an insulating EPDM foam sponge.

In one embodiment, the heat conducting block is a heat conducting silica gel insulating block.

Be provided with first weld part on the top face of offset plate between two anodal mounting holes that link to each other, range upon range of being connected with two first sheetmetals on the first weld part, two first sheetmetals extend to two anodal mounting hole directions respectively until operating personnel can make the anodal in first sheetmetal contact anodal mounting hole through pressing first sheetmetal. An operator can weld the first metal sheet and the positive electrode through the laser spot welding machine

The top end face of the rubber plate is provided with a second welding part between the two connected negative electrode mounting holes, the second welding part is connected with two second metal sheets in a stacking mode, and the two second metal sheets extend towards the two negative electrode mounting holes respectively until an operator can enable the second metal sheets to contact negative electrodes in the negative electrode mounting holes by pressing the second metal sheets.

The utility model discloses a theory of operation does: the utility model provides a battery module, this battery module's battery cell adopt flexible glue layer bonding to connect, and battery cell and baffle also adopt flexible glue layer bonding to connect, have saved built-up member through the flexible glue layer to the packaging efficiency between the battery monomer has been improved. The heat conduction block is clamped between the conductive parts of the adjacent single batteries, and the conductive parts are heat concentration areas in the charging and discharging process of the battery pack, so that the heat generated by the heat conduction parts of the single batteries in the battery pack can be conducted by the heat conduction block, and the heat balance among the single batteries in the battery pack is realized.

The utility model has the advantages that:

1. the battery modules are bonded and connected by the soft adhesive layer, so that the use of assembly parts is reduced, and the assembly efficiency is improved;

2. the heat conducting parts are arranged among the single batteries, so that the temperature of each single battery is balanced when the battery module is charged and discharged, the cycle life of the single batteries is prolonged, and the battery module is prevented from thermal runaway;

3. along with the increase of the charge-discharge cycle period of the battery module, the inside electric core of the single battery can have thermal expansion, the adjacent single battery can extrude to the soft rubber layer, and the extrusion force is absorbed through self deformation by the soft rubber layer so as to prevent the deformation of the battery module.

Drawings

The figures further illustrate the invention, but the embodiments in the figures do not constitute any limitation of the invention.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

Fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 3 is a partial a enlarged view of a battery module according to an embodiment of the present invention.

Fig. 4 is a partial cross-sectional view of a battery module according to an embodiment of the present invention.

Fig. 5 is a partial B enlarged view of a battery module according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1 to 5, an embodiment of the present invention provides a battery module, which includes a battery pack, a "U" shaped mounting frame 31, a baffle 32, a rubber plate 4, and a rubber tape 6. The group battery is for a plurality of battery cells 1 that set up side by side, and the group battery is placed in mounting bracket 31, and two baffles 32 set up respectively in mounting bracket 31 the preceding, rear end face and are connected with battery cell 1 through soft glue layer 2. The rubber plate 4 is disposed right above the mounting frame 31 and is connected to the two baffle plates 32 by bolt connections.

The adjacent single batteries 1 are connected through the soft rubber layer 2, the tops of the single batteries are conductive parts, and the conductive parts comprise anodes 11 and cathodes 12. The heat conduction block 5 is sandwiched between the conductive portions of the adjacent unit cells 1. The rubber plate 4 is provided with a plurality of anode mounting holes 41 and a plurality of cathode mounting holes 42, the number of the anode mounting holes 41 is consistent with that of the cathode mounting holes 42, the anode mounting holes 41 are arranged along the arrangement direction of the anodes 11 of the single batteries 1, the cathode mounting holes 42 are arranged along the arrangement direction of the cathodes 12 of the single batteries 1, and the anodes 11 and the cathodes 12 of the single batteries 1 are respectively inserted into the anode mounting holes 41 and the cathode mounting holes 42.

A first welding portion 43 is arranged between the two connected positive electrode mounting holes 41 on the top end face of the rubber plate 4, two first metal sheets 45 are connected to the first welding portion 43 in a stacked mode, and the two first metal sheets 45 respectively extend towards the two positive electrode mounting holes 41 until an operator can enable the first metal sheets 45 to contact the positive electrodes 11 in the positive electrode mounting holes 41 by pressing the first metal sheets 45. The operator can weld the first metal piece 45 and the positive electrode 11 by the laser spot welding machine. A second welding portion 44 is arranged between the two connected negative electrode mounting holes 42 on the top end surface of the rubber plate 4, two second metal sheets 46 are connected to the second welding portion 44 in a stacked manner, and the two second metal sheets 46 respectively extend towards the two negative electrode mounting holes 42 until an operator can make the second metal sheets 46 contact the negative electrodes 12 in the negative electrode mounting holes 42 by pressing the second metal sheets 46.

An operator uses a first conductive metal rod to connect all the first metal sheets 45 on the first welding part 43 in a laser spot welding mode along the arrangement direction of the first welding part 43, and the first conductive metal rod is electrically connected with the 1 positive electrodes 11 of all the single batteries and used as a positive electrode connecting terminal; the operator then uses the second conductive metal rod to connect all the second metal sheets 46 on the second welding portion 44 in the arrangement direction of the second welding portion 44 by means of laser spot welding, and the second conductive metal rod is electrically connected with the 1 negative electrodes 12 of all the single batteries and serves as a negative electrode connection terminal. The series connection of all the single batteries 1 of the battery pack is realized through the first conductive metal rod and the second conductive metal rod, and the first conductive metal rod and the second conductive metal can extend out of the rubber plate 4 to be connected with a load so as to supply power.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A battery module, its characterized in that:

the battery pack comprises a battery pack, a mounting rack, a soft rubber layer, an adhesive tape, a baffle, a rubber plate and a heat conducting block;

the battery pack is composed of a plurality of single batteries arranged side by side, the tops of the single batteries are conductive parts, each conductive part comprises a positive electrode and a negative electrode, and the adjacent single batteries are bonded and connected through the soft adhesive layer;

the front end face and the rear end face of the mounting rack penetrate through the mounting rack to form a containing groove, and a plurality of single batteries arranged side by side are placed in the mounting rack along the direction of the containing groove;

the single batteries positioned at the two ends of the battery pack are connected with the baffle plates in an adhesive mode through the soft rubber layers, and the mounting frame and the two baffle plates are fixedly connected through the adhesive tapes;

the rubber plate is arranged right above the single battery;

the heat conduction block is sandwiched between the conductive portions of the adjacent unit cells.

2. The battery module according to claim 1, wherein: the offset plate can cover the opening of the top face of mounting bracket, be provided with a plurality of positive mounting holes and a plurality of negative pole mounting hole on the offset plate, positive mounting hole with the quantity of negative pole mounting hole is unanimous, and is a plurality of positive mounting hole is followed battery cell the positive pole array orientation is arranged, and is a plurality of the negative pole mounting hole is followed battery cell the negative pole array orientation is arranged, battery cell the positive pole with the negative pole inserts respectively positive mounting hole with the negative pole mounting hole.

3. The battery module according to claim 2, wherein: the top end face of the rubber plate is provided with a first welding part between the two connected positive mounting holes, the first welding part is connected with two first metal sheets in a stacked mode, and the first metal sheets extend towards the two positive mounting holes respectively.

4. The battery module according to claim 3, wherein: and a second welding part is arranged between the two connected negative mounting holes on the top end surface of the rubber plate, two second metal sheets are connected on the second welding part in a stacking manner and extend towards the two negative mounting holes respectively.

5. The battery module according to claim 4, wherein: the rubber plate is connected with the baffle through a bolt connecting piece.